Only fourth of the screen shown with windows scaling 2x

Submitted by Paul Menzel

Assigned to Olivier Fourdan @olivier

Link to original bug (#14566)

Description

Created attachment 7850 Screen shot

Using Xfwm 4.13.1 only the top left fourth of a screen is shown when window scaling is set to 2x under Appearances. This is a regression from 4.13.0. The mouse cannot be moved out of the area.

Attachment 7850, "Screen shot":